1 | # content-type
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2 |
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3 | [![NPM Version][npm-image]][npm-url]
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4 | [![NPM Downloads][downloads-image]][downloads-url]
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5 | [![Node.js Version][node-version-image]][node-version-url]
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6 | [![Build Status][travis-image]][travis-url]
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7 | [![Test Coverage][coveralls-image]][coveralls-url]
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8 |
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9 | Create and parse HTTP Content-Type header according to RFC 7231
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10 |
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11 | ## Installation
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12 |
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13 | ```sh
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14 | $ npm install content-type
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15 | ```
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16 |
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17 | ## API
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18 |
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19 | ```js
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20 | var contentType = require('content-type')
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21 | ```
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22 |
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23 | ### contentType.parse(string)
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24 |
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25 | ```js
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26 | var obj = contentType.parse('image/svg+xml; charset=utf-8')
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27 | ```
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28 |
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29 | Parse a content type string. This will return an object with the following
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30 | properties (examples are shown for the string `'image/svg+xml; charset=utf-8'`):
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31 |
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32 | - `type`: The media type (the type and subtype, always lower case).
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33 | Example: `'image/svg+xml'`
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34 |
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35 | - `parameters`: An object of the parameters in the media type (name of parameter
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36 | always lower case). Example: `{charset: 'utf-8'}`
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37 |
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38 | Throws a `TypeError` if the string is missing or invalid.
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39 |
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40 | ### contentType.parse(req)
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41 |
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42 | ```js
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43 | var obj = contentType.parse(req)
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44 | ```
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45 |
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46 | Parse the `content-type` header from the given `req`. Short-cut for
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47 | `contentType.parse(req.headers['content-type'])`.
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48 |
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49 | Throws a `TypeError` if the `Content-Type` header is missing or invalid.
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50 |
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51 | ### contentType.parse(res)
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52 |
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53 | ```js
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54 | var obj = contentType.parse(res)
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55 | ```
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56 |
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57 | Parse the `content-type` header set on the given `res`. Short-cut for
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58 | `contentType.parse(res.getHeader('content-type'))`.
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59 |
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60 | Throws a `TypeError` if the `Content-Type` header is missing or invalid.
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61 |
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62 | ### contentType.format(obj)
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63 |
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64 | ```js
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65 | var str = contentType.format({type: 'image/svg+xml'})
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66 | ```
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67 |
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68 | Format an object into a content type string. This will return a string of the
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69 | content type for the given object with the following properties (examples are
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70 | shown that produce the string `'image/svg+xml; charset=utf-8'`):
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71 |
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72 | - `type`: The media type (will be lower-cased). Example: `'image/svg+xml'`
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73 |
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74 | - `parameters`: An object of the parameters in the media type (name of the
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75 | parameter will be lower-cased). Example: `{charset: 'utf-8'}`
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76 |
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77 | Throws a `TypeError` if the object contains an invalid type or parameter names.
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78 |
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79 | ## License
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80 |
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81 | [MIT](LICENSE)
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82 |
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83 | [npm-image]: https://img.shields.io/npm/v/content-type.svg
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84 | [npm-url]: https://npmjs.org/package/content-type
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85 | [node-version-image]: https://img.shields.io/node/v/content-type.svg
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86 | [node-version-url]: http://nodejs.org/download/
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87 | [travis-image]: https://img.shields.io/travis/jshttp/content-type/master.svg
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88 | [travis-url]: https://travis-ci.org/jshttp/content-type
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89 | [coveralls-image]: https://img.shields.io/coveralls/jshttp/content-type/master.svg
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90 | [coveralls-url]: https://coveralls.io/r/jshttp/content-type
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91 | [downloads-image]: https://img.shields.io/npm/dm/content-type.svg
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92 | [downloads-url]: https://npmjs.org/package/content-type
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